Jeff Loveness is an American screenwriter, television producer, actor, and comic book writer who has worked on the television series Jimmy Kimmel Live! and Rick and Morty, as well as the Marvel Cinematic Universe film Ant-Man and the Wasp: Quantumania (2023).
Career Loveness graduated from Pepperdine University with a Bachelor of Fine Arts in 2010. He started his career by writing several television episodes for Jimmy Kimmel Live! and Miracle Workers. In March 2015, Loveness wrote a comic series centered around the Marvel Comics character Groot, alongside artist Brian Kesinger. In May 2017, he wrote several comic issues centered around other Marvel characters, including Nova and Spider-Man.
He later gained notability for writing four season four Rick and Morty episodes. Soon after, he was hired by Marvel Studios to write the screenplay for Ant-Man and the Wasp: Quantumania. In December 2020, Loveness revealed that he had turned in the first draft of the script, and said Marvel had used the COVID-19 pandemic break to "do something new and weird" with the film.
He came back in 2021 to write the Rick and Morty season 5 opening episode "Mort Dinner Rick Andre" and the finale, "Rickmurai Jack", which is his final episode of the show. In September 2022, Loveness was hired to work again with Marvel Studios by writing the screenplay for Avengers: The Kang Dynasty, but was later replaced by Michael Waldron, Stephen McFeely, Chris McKenna, and Erik Sommers, who rewrote the film as Avengers: Doomsday (2026).
Filmography Television YearTitleCredited asNotes / Ref(s) Writer Producer Actor 2010 The Office Episode: "Christening"Role: Young Adult Ministry Deserter 2010–2011 Onion News Network Episodes: "Excitement Growing Among Beatles Fans for Paul McCartney's Funeral", "Snowlocaust", "Real America", and "American Dream" 2011–2016 Jimmy Kimmel Live! 238 episodesRoles: Glenn / Shirtless Fighting Pit Dueler / Kristen Wiig's Creepy Date / Audience Jedi 2012 64th Primetime Emmy Awards TV special 2016 68th Primetime Emmy Awards 2017 89th Academy Awards 2019 Miracle Workers Episode: "12 Days"Story editor for 7 episodes 2019–2022 Rick and Morty Episodes: "Claw and Hoarder: Special Ricktim's Morty", "Never Ricking Morty", "Promortyus", "The Vat of Acid Episode", "Mort Dinner Rick Andre", and "Rickmurai Jack"Supervising producer for 19 episodesRole: Japheth's Son, Marvin (voice; 2 episodes)
Film YearTitleCredited asNotes / Ref(s) Writer Other 2023 Ant-Man and the Wasp: Quantumania Spider-Man: Across the Spider-Verse Special thanks
Accolades List of awards and nominations Award Date of ceremony Category Series Result Primetime Emmy Award September 22, 2013 Outstanding Writing for a Variety Series Jimmy Kimmel Live! September 19, 2020 Outstanding Animated Program Rick and Morty September 3, 2022 Outstanding Animated Program Rick and Morty
Bibliography Aftershock Comics World Reader #1–6
Boom! Studios Judas #1–4 Strange Skies Over East Berlin #1–4
DC Comics Source: Justice League (vol. 4) #51–52 Mysteries of Love in Space No. 1 (Lois Lane & Superman: Glasses story) Shazam! (vol. 3) No. 12, 15 Tales from the Dark Multiverse: Death of Superman #1
Marvel Comics Source: Amazing Spider-Man Annual No. 42 (The Many Costumes of Spider-Man story) Amazing Spider-Man (vol. 6) No. 6 (Spidey Meets Jimmy story) Amazing Spider-Man Special / Inhuman Special / All-New Captain America Special Avengers: No More Bullying No. 1 (Weird story) Death of Wolverine: Life After Logan No. 1 (You story) Groot (vol. 1) #1–6 Marvel Super Hero Adventures: Captain Marvel – Halloween Spooktacular #1 (Sanctum Spooktorum story) Marvel Super Hero Adventures: Spider-Man – Web of Intrigue #1 (The More The Merrier story) Miles Morales: Spider-Man No. 30 (The Best Part story, with Phil Lord, Christopher Miller and Kemp Powers) Nova (vol. 7) #1–7 Venom Annual No. 1 (Nobody Does It Better story)
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